Textual version: I've got a transformer taking AC power and converting down to 12v 3AMPs (even tried a 1A) that I'm feeding power to 10 channels of a 16 channel relay (daisy chained). I then am running power from each relay (normally closed side) out to ten 12v peristaltic pumps. From transformer I'm running a second set of power (VC/GRN) to the needed main 12v power on the relay board. From the main power source of the relay board, I'm running a ground line that is daisy chained to each peristaltic pump. Lastly I've got a second set of power (VC/GRN) running from main power of relay to a breadborad that powers LEDs, RTC, SD Card Reader and Arduino. I have grounded one of the 5v pins on the relay to the breadboard.
Issue is that I when I run any pump higher than first pump (aka relay #1) my Arduno resets when killing power to pump. I've seen other's get around this issue on here using something called a snub, but I'm not sure what parts I need to make that or where I should hook it in for each channel.. any information would be greatly appreciated.